Recently there was discussion in this forum regarding the shape of the wound in Gov. JBC's back.
Here is a drawing of the wound, by JBC's surgeon, Dr. Robert Shaw.

Shaw thought it most likely that JBC was shot from above and behind, by a slug unimpeded by any obstructions. No tumbling. So you had an elliptical or ovoid wound, north-south on JBC's body.
Shaw debrided the wound, thus enlarging the final resulting scar.
In addition, there is a small round hole in the rear of JBC's assassination-day shirt.

I doubt the bullet that struck JBC was tumbling.
The evidence, as seen in JBC's shirt and the doctors sketch, points away from a tumbling bullet.
Caveat emptor, and draw your own conclusions.

The small hole in the back of JBC's shirt and the small hole in the front of his jacket prove, beyond the slightest doubt, that the bullet was not "tumbling" [

]
For traditional LNer's (not the Tinfoil Nutters who have emerged from the woodwork recently) this poses a very large problem.
JFK and JBC were shot through by the same bullet at z222/223. The bullet did not tumble.
How, then, can this bullet be CE399?
What mental gymnastics need to be employed to account for the metal fragments in JBC's wrist if the bullet didn't tumble.
For now we can ignore the FACT that there isn't the smallest particle of evidence linking CE399 to Parkland Hospital and a mountain of evidence against it.
We can also ignore the FACT that CE399 was entered into evidence as the bullet found in Parkland without anyone identifying it as such.
The evidence proves the bullet fired through both men did not tumble.
Yet there are metal fragments in JBC's wrist.
How do LNers square this circle?
PS: Cole's suggestion, that JBC was shot in the back while lying in Nellie's lap, is possibly the most preposterous thing ever posted on this forum...and that really is saying something.